133333400 has 24 divisors (see below), whose sum is σ = 310000620. Its totient is φ = 53333280.

The previous prime is 133333391. The next prime is 133333439. The reversal of 133333400 is 4333331.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333134 + ... + 333533.

Almost surely, 2^133333400 is an apocalyptic number.

133333400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133333400 is an abundant number, since it is smaller than the sum of its proper divisors (176667220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133333400 is a wasteful number, since it uses less digits than its factorization.

133333400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666683 (or 666674 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 20.

The square root of 133333400 is about 11547.0082705435. The cubic root of 133333400 is about 510.8730400745.

Adding to 133333400 its reverse (4333331), we get a palindrome (137666731).

The spelling of 133333400 in words is "one hundred thirty-three million, three hundred thirty-three thousand, four hundred".